The wine locker rental Bertram enters was under the name of "Mr. Thomas."  It was filled with wine. 

Thomas McAllister is the Sheriff of Napa County, the heart of wine country.

Sounds like McAllister could very well end up being Red John.  In addition, if he brought a bomb to Jane's house, Red John would likely use the chaos to fake his own death as part of his plan.

I hate to say it, but after his creepy effort to get Van Pelt into his car in the second episode of this show, Sheriff McAllister may well turn out to be Red John.